#include<bits/stdc++.h>
#define i64 long long
#define ull unsigned long long3
using namespace std;

const int N = 1e6 + 10, INF = 0x3f3f3f3f;


void solve()
{
    int n;
    cin >> n;
    int sum = 0;
    for (int i = 0; i < n; i++) {
        int x;
        cin >> x;
        sum += log2(x);
    }
    if (sum == 0) {
        cout << 0 << endl;
        return;
    }
    cout << sum / 11 + 1;
}

signed main()
{
    //ios::sync_with_stdio(0);
    //cin.tie(0);cout.tie(0);
#define ONLINE_JUDGE
#ifndef ONLINE_JUDGE
    std::istringstream in(R"()");
    std::cin.rdbuf(in.rdbuf());
#endif
    int T = 1;
    //cin>>T;
    for (int i = 1;i <= T;i++) {
        solve();
    }
}